For the FIREPOWER Ar_234b_2 Blitz.these are addon RATO motors built buy JAYCEE.these are only for looks and are not powered.it's not possible to add temporary power to a cfs3 jet.but i created a little more power for the jet.it now takes off in a reasonable distance.and will fly 465 mph at 15.000 ft. this is not an E.V.A.file. just slightly power improved by SLIP STREAM.read the read me for installation instructions.it is an addon not a standalone.and you must have FIREPOWER for this plane.on behalf of JAYCEE and SLIP STREAM have fun.